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Radon Warranty Coverage for New Home Owners

couple moving into home radon warranty coverage blog

Warranty Coverage

Tarion provides new homeowners with warranty coverage, for excessive Radon levels. The warranty covers remediation of radon gas in excess of 200 Becquerels per cubic metre (BqM3) and coverage lasts for up to seven years. Ontario is the only jurisdiction in Canada where the builders’ warranty on new homes includes radon remediation coverage.

Testing Your Home for Radon

If you are concerned about possible radon levels in your home and would like us to assist you to test your home, please contact us by email at or call us directly at 613-929-9534. We are C-NRPP Certified measurement and mitigation professionals and can assist you navigate this process at no charge.

Making a Warranty Claim for Excessive Radon

If the results you receive from a long-term test (of at least three months) indicate that the radon level in your home is above 200 Becquerels per cubic metre, we can provide you with an estimate to fix the problem which you can provide to your builder. You can also make a claim to Tarion based on the warranty period you are in:

  • If you are in your first year of possession of your new home, submit a 30-Day or Year-End Form.

  • If you are in your second year of possession of your new home, submit a Second-Year Form.

  • If you are in years 3-7 of possession of your new home, submit a Major Structural Defect Form.

To learn more about the potential health effects of radon, visit the following link:



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